US2563990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wave guide switching arrangement
Assignee: AT&T Inc
•
Filing: 1944-09-23
•
Granted: 1951-08-14
•
Expires: 1964-09-23
Abstract
No abstract record available.
Inventors
- 👤 Cassius C Cutler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:09
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/03; G01S7/034; H; H01; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/122; H01Q; H01Q3/00; H01Q3/24; H01Q3/245; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |